Which retail innovation, first introduced in the early 20th century, revolutionized shopping by allowing customers to select products themselves rather than requesting them from clerks behind counters?

The retail landscape has been transformed by countless innovations throughout history. From humble beginnings to cutting-edge technology, these inventions have shaped how we shop and interact with products. This poll tests your knowledge about a groundbreaking retail invention that fundamentally changed customer shopping behavior and sparked a revolution in store design and merchandising strategy. Do you know which innovation first gave customers direct access to products without clerk assistance?

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Self-service grocery stores (pioneered by Piggly Wiggly in 1916)
Shopping carts (invented by Sylvan Goldman in 1937)
Barcode scanners (first used commercially by Kroger in 1974)
Department stores (pioneered by Bon Marché in Paris, 1852)